Source Code Cross Referenced for BlockCipher.java in  » Security » Bouncy-Castle » org » bouncycastle » crypto » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Security » Bouncy Castle » org.bouncycastle.crypto 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        package org.bouncycastle.crypto;
02:
03:        /**
04:         * Block cipher engines are expected to conform to this interface.
05:         */
06:        public interface BlockCipher {
07:            /**
08:             * Initialise the cipher.
09:             *
10:             * @param forEncryption if true the cipher is initialised for
11:             *  encryption, if false for decryption.
12:             * @param params the key and other data required by the cipher.
13:             * @exception IllegalArgumentException if the params argument is
14:             * inappropriate.
15:             */
16:            public void init(boolean forEncryption, CipherParameters params)
17:                    throws IllegalArgumentException;
18:
19:            /**
20:             * Return the name of the algorithm the cipher implements.
21:             *
22:             * @return the name of the algorithm the cipher implements.
23:             */
24:            public String getAlgorithmName();
25:
26:            /**
27:             * Return the block size for this cipher (in bytes).
28:             *
29:             * @return the block size for this cipher in bytes.
30:             */
31:            public int getBlockSize();
32:
33:            /**
34:             * Process one block of input from the array in and write it to
35:             * the out array.
36:             *
37:             * @param in the array containing the input data.
38:             * @param inOff offset into the in array the data starts at.
39:             * @param out the array the output data will be copied into.
40:             * @param outOff the offset into the out array the output will start at.
41:             * @exception DataLengthException if there isn't enough data in in, or
42:             * space in out.
43:             * @exception IllegalStateException if the cipher isn't initialised.
44:             * @return the number of bytes processed and produced.
45:             */
46:            public int processBlock(byte[] in, int inOff, byte[] out, int outOff)
47:                    throws DataLengthException, IllegalStateException;
48:
49:            /**
50:             * Reset the cipher. After resetting the cipher is in the same state
51:             * as it was after the last init (if there was one).
52:             */
53:            public void reset();
54:        }
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